export type QuantityBreak = {
    min: number;
    discount: number;
};
/** The fractional discount (0–1) that applies at a given quantity. */
export declare const quantityDiscount: (breaks: QuantityBreak[], quantity: number) => number;
/** The next break a buyer hasn't reached yet (for "order N+ to save X%" hints). */
export declare const nextQuantityBreak: (breaks: QuantityBreak[], quantity: number) => QuantityBreak | null;
/**
 * Sanitize admin-entered breaks: numeric, min ≥ 1, discount clamped to
 * [0, 0.9], deduped by min (last wins), sorted ascending — the shape
 * quantityDiscount's reduce depends on. Always includes a min-1 base row.
 */
export declare const normalizeQuantityBreaks: (raw: unknown) => QuantityBreak[];
export type TierRow = {
    min: number;
    discount: number;
    /** Discounted unit price for a given base unit price. */
    unitPrice: number;
    /** Per-piece savings vs the single-piece price. */
    savings: number;
};
/** Price-table rows ("12+ → $25.20 each, save 10%") for a base unit price. */
export declare const tierRows: (breaks: QuantityBreak[], baseUnitPrice: number) => TierRow[];